Various bonsai soil and aggregates are available. Black and red lavas, pumice, coarse rock, Kanuma, and soil mix ready to use. All come in small, medium or large particle sizes, meticulously sifted to remove dusty particles. - Lavas, pumice and soil mix ready to use are $7.- per liter - Azalea soil mix is $8.- per liter - Kanuma Japanese soil is $10.- per liter Available in Brentwood Bay.